Katarina 'Kate' Andrich, a young aspiring singer, works a dead-end job as an elf at a year-round Christmas shop in Central London, whose owner calls herself 'Santa'. She is homeless after being forced out by her flatmate. While at work, she notices a man outside staring upwards. She talks with him, learning that his name is Tom. She comes to learn that Tom has a very strange past but that past is all more of the reason to love him. Loosely based on the song of the same name.